Avoid random "hack forums." Look for open-source changers on GitHub or trusted CS 1.6 community sites like GameBanana or CS.rin.ru . (We will list specific names below).
(advanced): Search for ASCII strings of old master servers and replace them with new ones using a hex editor. Cs 1.6 Ip Changer
Gamers typically look for an IP changer for several strategic reasons: Avoid random "hack forums